Q. A particle moves in a circle of radius 5 cm with constant speed and time period 0.2π s. The acceleration of the particle is
A) 5 m/s²
B) 15 m/s²
C) 25 m/s²
D) 36 m/s²
Explanation
[Solution from source] ω = 2π/T = 2π/(0.2π) = 10 rad/s, and the centripetal acceleration is a = ω²r = 100 × 0.05 = 5 m/s². Forgetting to convert 5 cm to metres gives a value 100 times too large. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.